Fig. 2
Correlation between FIR and CO luminosities, for the CLoGS sample (filled red triangles). The dashed line represents a depletion time-scale of 2 Gyr, assuming a conversion factor α = 4.6 M⊙ (K kms-1 pc2)-1. The shaded regions represent the main location of nearby spiral galaxies (from Bigiel et al. 2008), within a factor 3 around the mean depletion time-scale of 2 Gyr.
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